Definition of evidence for Students. 1  1 : a sign which shows that something exists or is true : indication They found evidence of a robbery. 2  2 : material presented to a court to help find the truth about something.
Francis Crick and his American colleague, James Watson, discovered the double helix structure of DNA. For this fundamental finding Francis, James and Maurice Wilkins were awarded the Nobel Prize for Physiology or Medicine in 1962.nravelling the double helix Stories The discovery of the structure of DNA by James Watson and Francis Crick in 1953 is one of the most famous scientific discoveries of all time. Unravelling the double helix Stories.
Concept 19 The DNA molecule is shaped like a twisted ladder. James Watson and Francis Crick explain how they solved the structure of DNA. Erwin Chargaff explain how he measured the levels of each of the four nitrogenous bases. I'm James Watson. I'm Francis Crick. In 1953, Francis and I published the first accurate model of the DNA molecule. We were interested in DNA â the hereditary molecule of life. We wanted to build on what was chemically known about DNA, and determine its actual structure.